The metallic-line close binary system IW Persei

Details The metallic-line close binary system IW Persei The metallic-line close binary system IW Persei

Apr 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980ap%26ss..68..355k&link_type=abstract

Astrophysics and Space Science, vol. 68, no. 2, Apr. 1980, p. 355-384.

Astronomy and Astrophysics

Astrophysics

4

A Stars, Binary Stars, Line Spectra, Metallic Stars, Stellar Spectra, Stellar Spectrophotometry, Electrophotometry, Light Curve, Radial Velocity, Spectroscopic Analysis, Stellar Mass, Surface Temperature, Ubv Spectra

Scientific paper

Photoelectric observations in U, B, and V are presented for the ellipsoidal variable IW Per, a single-line close spectroscopic binary system with metallic-line A-type spectra. From these observations and from spectrograms, spectroscopic orbital elements are determined as follows: K1=99.3 km/s, gamma=0.2 km/s, a sin i=1.80 solar radii, and f(m)=0.093 solar masses (SMs). In addition, an orbital inclination of 63 deg and a fractional radius of 0.294 are deduced for the primary component (PC). Assuming the mass of the PC to be 2.0 SMs, the mass of the secondary is calculated to be 1.08 SMs, which would correspond to a Go-type if it is a main sequence star.

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